Our surface treatments focus on improving corrosion protection, adjusting the friction co-efficient and enhancing component aesthetics.

Our surface treatment processes include electroplating, phosphating and GEOMET, which are all chromium(VI)-free.

Electroplating

The steel parts can be economically protected against corrosion with zinc or zinc alloy coatings. Coating sickness is 8~13μm. then by deactivation and seal treatment the corrosion protection can be further enhanced by the addition a secondary passivation and a final sealing coat.

Salt spray test

Type

White rust

Red rust

ZnZinc & color passivation & sealing

>96h

>240h

Zinc & black passivation & sealing

>96h

>240h

Zn-Ni coating & color passivation & sealing

>200h

>1000h

 

Phosphating

Anti-corrosion is realized through a layer of phosphate film which is formed on the part surface.

Salt spray test 

Type

SST test

Manganese phosphating & rust preventing oil  

>24H

Zinc phosphating & rust preventing oil

>24H

 

GEOMET(GEOMET)

GEOMET coating is formed on part surface through centrifugal immersion or spraying technique, which can effectively avoid hydrogen embrittlement and thus better anti-corrosion effect is realized.

Salt spray test

Type

CCT test

SST test

GEOMET+PLUS

480H

1000H

 

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